Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Super-resolved pure-transverse focal fields with an enhanced energy density through focus of an azimuthally polarized first-order vortex beam

Not Accessible

Your library or personal account may give you access

Abstract

We report on the experimental demonstration of super-resolved pure-transverse focal fields through focusing an azimuthally polarized first-order vortex (FOV) beam. The optimized confinement of focal fields by creating constructive interference through the superposition of the FOV on an azimuthally polarized beam is observed by both a scanning near-field microscope and a two-photon fluorescence microscope. An enhanced peak intensity of the focal spot by a factor of 1.8 has been observed compared with that of the unmodulated azimuthally polarized beam. The super-resolved and pure-transverse focal fields with a 31% reduced focal area determined by the full-width at half-maximum compared to that of tightly focused circular polarization is experimentally corroborated. This superiority over the circular polarization stands for any numerical aperture greater than 0.4. This technique holds the potential for applications requiring subwavelength resolution and pure-transverse fields such as high-density optical data storage and high-resolution microscopy.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Polarization-multiplexed multifocal arrays by a π-phase-step-modulated azimuthally polarized beam

Haoran Ren, Xiangping Li, and Min Gu
Opt. Lett. 39(24) 6771-6774 (2014)

Ultralong pure longitudinal magnetization needle induced by annular vortex binary optics

Sicong Wang, Xiangping Li, Jianying Zhou, and Min Gu
Opt. Lett. 39(17) 5022-5025 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved